FreeLists / si-list / [SI-LIST] Re: matching within 1 mil

["jon_powell37" <jon.n.powell@xxxxxxxxx>]

When I see these rules to match within 10 mils (or n mils) I wonder who 
much matching is really required in the electrical sims (or other 
assumptions). Because I don't believe that matching physical length is 
the same as matching electrical length. And the router only does 
physical length. So the question is, "how close is electrical length to 
physical length". I would be very suprized if the accuracy can be 
expected to be better than the line width (call it 5 mils).

So, if we are just making a "easy to understand" rule. Fine.
But if it is a necessary rule. Not fine.

Jon





Disclaimer:
The content of this message is my personal opinion only and although I
am an employee of Intel, the statements I make here in no way represent
Intel's position on the issue, nor am I authorized to speak on behalf of
Intel on this matter.

------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field


List technical documents are available at:
                http://www.si-list.net

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu